Personally, I feel that if the Charismatic movement brings individuals to the Church, then it is accomplishing it’s mission. That being said, I’ve found in my own experiences that each charismatic group tends to have its own “agenda” and “theologies” that make it different from what the original movement should be. At my old parish, I attended the charismatic prayer group for a while with other youth of the parish and they pushed speaking in tounges on all of us. Being young (16-17 or so) and fairly naive, I thought the individuals who led the group knew what they were doing and what they were talking about. I couldn’t have been more wrong.
They always talked about how “When Mary comes around, you smell roses” but what they didn’t tell you was that when they would annoint you with oil while you were “slain in the spirit” that the oil was rose scented. I only found this out after the leader of the group dropped his vial and I picked it up for him. That’s not only deceitful, but it’s promising something that may or may not be occuring. I went to that group off and on for a few years, but the final straw of my going to that group was when I was explicitly made an example of. I had the audacity to question the leader, in private, about some of the practices they did. I found it odd that the same lady could be “slain in the spirit” twice a week, and that for some reason, she’s the only person this phenomena happened to. I also asked about their speaking in tounges and how they felt and taught that unless you had that gift, your prayers weren’t as effective. Obviously, he had no answer for me and got defensive. At the next meeting, I was called out for questioning God and His movement and shunned by that group. Although it wasn’t that big a deal to me, it was a group of like 12 people or so and they were all old, the group leader had a discussion with our priest about me. Fortunately, my priest knew me well enough to know that I wasn’t someone out to destroy the Church or “God’s Movement” and that’s as far as it went.
Again, this is only my personal experience, but I’ve talked to enough people about it who have had stories of a similar nature, whether it’s being lied to or told things that “they feel are right” and not in accord with true Church teaching, and that questioning that is not a great idea. I always kinda looked at the whole movement as more of a fringe thing anyway.